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- Title
THERMOLUMINESCENCE PROPERTIES OF K2GdF5:Tb MATERIAL IRRADIATED IN NEUTRON-GAMMA FIELDS OF <sup>241</sup>Am-Be SOURCE.
- Authors
Van-Toan PHAN; Van-Hung NGUYEN; Hung-Thai PHAM; Van-Dung PHAM; Dinh-Khoa TRAN; Hoai-Nam TRAN
- Abstract
This paper presents the thermoluminescence properties of K2GdF5:Tb material irradiated in a reference neutron-gamma field and its possibility to be used in neutron dosimetry. Double fluoride of K2GdF5 doped with 10 at% Tb3+ ions was synthesized under solid-state reaction conditions and irradiated in the reference neutron-gamma field of 241Am-Be source. The thermoluminescence glow curves were measured by the Rexon UL-320 TLD reader connected with the WinRex-320 processing program for obtaining the integrated thermoluminescence signals (counts). The results show that the temperature peaks of the irradiated K2GdF5:Tb material concerning the gamma and neutron fields at the distance of 100 cm from the source are at 230 °C and 300 °C, respectively. The sensitivity ratios of fast-to-thermal neutron and gamma-to-thermal neutron are 6.3 % and 18.2 %, respectively. The batch homogeneity and reproducibility are less than 30 % and 7.5 %, respectively. The linearity is less than 10 % in the dose range of less than 24 mSv. The detection threshold is less than 0.1 mSv, and the fading is 10.7 % after 90 days of irradiation. These thermoluminescence properties of K2GdF5:Tb material considerably satisfy the requirements to be used in neutron dosimetry.
- Subjects
THERMOLUMINESCENCE; NEUTRONS; REFERENCE sources; HOMOGENEITY; FLUORIDES
- Publication
Nuclear Technology & Radiation Protection, 2024, Vol 39, Issue 1, p37
- ISSN
1451-3994
- Publication type
Article
- DOI
10.2298/NTRP2401037P